/*
 * Copyright © 2025 Apple Inc. and the Pkl project authors. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.pkl.parser.syntax;

import java.util.List;
import org.pkl.parser.ParserVisitor;
import org.pkl.parser.Span;
import org.pkl.parser.util.Nullable;

public interface Node {
  Span span();

  @Nullable
  Node parent();

  void setParent(Node parent);

  @Nullable
  List<? extends @Nullable Node> children();

  <T> T accept(ParserVisitor<? extends T> visitor);

  default String text(char[] source) {
    return new String(source, span().charIndex(), span().length());
  }
}
